Animation help

I'm using Poser 7 to make animation.. its easy but now I'm having a problem making one type of animation...

I'll try to explain..

I just want one arm doing the animation.. so the char. looks like a static pose, just standing there with, lets say, both arms out then the left arm is the only animation part and its moving up and down.. now when the animation starts, I don't want to see the arms moving out infront.. I want the arms already out in front for the 1st frame.. then the left arm moving up and down and I want it to loop so, again, the left arm is moving up and down over and over in a smooth motion... what I did was start on keyframe 2 put both arms out then go to like key frame 10 and move the left arm up, then keyfram like 15 move it back to 0, keyframe like 20 move it down and keyframe 25 move it to 0... now I thought looping this would do what I want but from frame 2 to 10 the arms move all crazy.. like they go behind the guy.. I'm doing something wrong so plz help me out

thx

Use the Animation Palette and set all the frame 2 keyframes to Break Spline.

u want me to set all the frames to keyframes then set all of it to Break Spline?

Just the ones you have keyframes on, set those to Break Spline. It sounds like your problem is the interpolation being messed up because of the first frame, and to fix that use Break Spline on your keyframes in the second frame.